题解 | #计算商品打折结算金额#

#include <iostream>
#include <iomanip>
using namespace std;

int main() {
    
    double price;
    cin >> price;

    double cost = 0.0;

    // write your code here.......
    if(price>=100)
    {
        cost=price*0.9;
        if(price>=500)
        {
            cost=price*0.8;
            if(price>=2000)
            {
                cost=price*0.7;
                if(price>=5000)
                {
                    cost=price*0.6;
                }
            }
        }

    }

    cout << setiosflags(ios::fixed) << setprecision(1) << cost << endl;

    return 0;
}